Control and release device



E. B. THURSTON.

CONTROL AND RELEASE DEVICE.

APPLICATION FILED MAR. 22, I9l6.

Patented Feb. 10,1920.

airman ERNEST B. THURSTOLL'OF TOLEDO, OHIO, ASSIGrNOR '10 THE HAUGHTONELEVATOR & MACHINE (30., OF TOLEDO, OHIO, A CORPORATION OF OHIO.

oou'rnon AND IRELEA$E DEVICE.

Specification of Letters Iatent.

Patented Feb.10,1920.

Application filed March 22, 1916. Serial No. 85,941.

To all whom it may concern:

Be it known that I, ERNEST B. THURs'roN, a citizen of the United Statesof America, residing at Toledo, Lucas county, Ohio, have invented newand useful Control and Release Devices, of which the following is aspecification.

This invention has utility when incorporated in control and releasedevices, especially as an automatic lock-out of power current forelevators when an elevator door is open.

Referring to the drawings: I

Figure 1 is a fragmentary view of an elevator well looking out towardthe door,

with the car approaching the floor, showingv an embodiment of theinvention in the elevator well;

Fig. 2 is a view of an embodiment of the invention in the door lock ofFig. 1, with the door closed;

Fig. 3 is a view of the mechanism of Fig. 2 as coacting in releasingposition;

Fig. at is a side elevation of the first series of levers;

I Fig. 5 is a view on an enlarged scale of the rockable dog and itsmounting; and

Fig. 6 shows an anti-friction connection between the first and secondseries of levers.

In the elevator well 1 at the'landing 2' is disposedthe slidable door 3.As the car 4 approaches the landing 2, the intercepter 5 comes intoposition at the nose of the dog 6. This device has special adaptation inconnectionwith elevators of the so-called automatic or push button type,and embodies a safety device precluding opening of a door at any floorwhile the car is away, from or traveling past such floor, for should'theactuating member 7 be grasped to throw the dog6, the movement of themember 5 striking a sideof the nose of the dog 6 would rub therealongand tend to rock this dog 6. There would be no holding of the dog 6 bythe member 5 as an abutment. The actuating member 7 is a lever havingits fulcrum bearing 8 and the short arm 9 coacting in the'rocking of thelever to compress the yieldable means or spring 10 and thereby tendingto throw the release member or latch 11 having the fulcrum bearing 12.These pivot or fulcrum bearings 8 and 12 may, in the embodiment of thisdevice for elevator purposes, be mounted on or in a sliding door movabletoward a fixed lock casing or box 13 carried by the well.

The actuating member has a lever arm 14 extending through a recess 15 ofthe casing 13 to engage the arm 16 of the'bell crank 20 carrying thepivot pin 21 for mounting the rockable dog 6. This dog 6 has its p0si- Ition normally maintained by the counterweight 22, .While the stabilityof this dog is further maintained by the coil spring 23 coacting withthe lug 24ccarried by the pin 21 and the lug 25 carried by the dog. Thedog is accordingly free to be rocked either up or down by the movingintercepter 5 but is normally maintained in a position to be confrontedby or abut directly the intercepter 5 when the intercepter 5 isstationary and the elevator car is at a landing.

In this abutting action, any rocking of the bell crank levers'16, 18tending to throw the pin 19 would leave the pin 21. fixed and therocking of lever 18 would throw the arm 26 fast on the shaft 19 upwardagainst the re-' sistance of the spring 27 from the position of this arm26 as adjusted by the stop 28 co-.

acting with thearm 18. The arm 26 would not be lifted were'the dog 6 notintercepted by the member 5, This lifting of the arm 26 of the secondbell crank 20, 26, coacts with the shoe or bearing 29 of the arm 30 ofthe third bell crank lever having its ful-. crum 31 in the casing 13. Inany rocking of this arm 30 0f the bell crank lever 30, 32, the

arm 32 is rocked away from its holding positionabov ethe latch head endof the lever 11 protruding through the opening 33 and thus engaged inthe casing 13. This rocking of the, arm 32 is against the action of the7 spring 34 from: the arm 35 of the spring poised lever having thefulcrum- 36 in the casing 13. Thisspring poised lever has its second arm37 coacting with the spring 38 forcing this arm 37 toward the latchrecess 33 in the casing '13. This coaction of the secondseries of levers30, 32; 35, 37, is such that with'the latchll in the recess .33, thelever 35, 37, has its spring 34 acting to hold the series of levers 30,32; 35, 3,7.

With the latch head of the lever 11 out of r the casing 13, the actionof the spring38 has 7 against this latch opening 33 to obstruct said" Vwith the door open; Further, the door may thrown the arm 37 of the lever35, '37,

opening 33 as to entrance of the latchll thereinto. This causes thespring 34 to rock the lever member 30, 32, so that the contacts 39, 40,41, 42, are open and arm 32, is away from the latch recess 33.'Therocking of the lever 30, 32, whether from the arm 26 or from lever32, 35, moves the switch contacts 39, 40, carried by the arm'30 awayfrom the fixed contacts 41, 42, and thus breaks the circuit 43, whichmay interact to preclude.

driving oi the car when this switch is open. Asthis switch is open onlywhen the door is open and is so opened by the opening of the door,byleaving the door open there is an automatic safety device precludingshifting of the elevator car away from a landing not be'open unless thecar is at a landingin the normal manipulation of the apparatus. Evenwith any attempt at tampering with the apparatus, as by insertion of amember in the latch opening 33, the switch 39, 40, 41,

' 42, is only closed while such member is maintained in position.

These connections are simple in their interaction, for the dualmovements are protected against tampering, may be assembled asa safety.device unit before installation, and are most easily and readilyoperable withthe usual freedom of a doorrelease device. However,supplemental freedom in case of operation may be attainedby provicL' ingthe second'bell crank with the arm 44 instead of thearm 26 and mountingonsaid arm 44 the anti-friction roller 45 for antifriction coaction inthe latch "freeingtrav'el with the arc shoe 46 of the arm 30 ofthe thirdbell crank lever.

"The switch 39, 40,41, .42 is so disposed with the electric connectionsthat a .childinserting its finger in the latch opening 33 may notvreceive an electricshock.

' What is claimed and it is desired to secure by United States LettersPatent is: i g

l.' Acontrol'apparatus comprising a loci; housing,a relatively travelingpivoted latch, said housing having an opening providing a latch seat, anactuator carried with the latch, movable independently of the latch andhaving .a portion extending into the housing, a first device in the lockhousing Operable by the actuator independently of affecting the latch, asecond device, a rel a member forthe latch a settin member for therelease member, and means for causing the first device to coact w th theseconddevice for shifting the release member into latch freeing positionagainst the resistance of the setting member. 7

2. A control apparatus comprising a locl: housing, a relativelytraveling'pivoted latch, said housing havinga latch seat, anactuatorcarried with the latch, movable independently of the latch andhaving a portion extending into the housing, a first device in the lockhousing operable by the actuator independently of affecting the latch, asecond device, a release member for the latch, a setting member for therelease member, means for causing the first device to coact with thesecond device for shitting the releasemeinber into latch freeingposition agalnst the resistance of the setting member until the latch isw1thdrawn, and a spring for holding the setting member inposition to bemoved by the latch enteringitshousing seat.

3. control apparatus comprising lock housing, a relatively travelingpivoted latch,

said housinghaving a latch seat, an actuator carried with the latch,movable independently ofthe latch and having a portion e X tending intothe housing, a first device in the lock housing operable by, theactuator. 1I1ClQPQIIClQDtlY of affectmg the latch, a sec-' ond device, arelease member fol-the latch, a setting member for the release mem'ber,means for causing the firstdevice to coact with the second device forshiftingithe release member against the resistance of ,the settingmember into latch freeing position, and connecting means between thesetting member and the release member holding the release member awayfrom locking position when the setting member is in position to obstructentrance of the latch to the latch seat.

housing, having alatch seat, a latch movable into said seat, an actuatorarried with the latch and extending into the housi ng,a first device inthe housing operable by the actuator, a second device, a release memberforthe latch, a settingmember for the release member, means for causingthe first actuator,a second device, a release member 4. Acontrolapparatus comprising a lock for the latch, a setting member forthe release member normally actuable into position to obstruct latchentrance to the latch seat, means for causing the first device to coactwith the second device for shifting the release member, and connectingmeans between the members causing the setting member in latch seatobstructing position to hold the release member away from lookingposition.

6. Control apparatus including a pivoted latch, a holding seat for thelatch, a setting member obstructing the seat when the latch is clear ofthe seat, and a release member operable from the setting member forlooking the latch in the seat.

7. Control apparatus including a latch, a holding seat for the latch, arelease memher for locking the latch in the seat, and a setting memberobstructing the seat when the latch is clear of the seat abutted by thelatch in the seat to throw the release member into latch lockingposition.

8. Control apparatus including a movablelatch, a holding seat for thelatch, and relatively movable release and setting members, the lattermember obstructing the latch seat when the latch is out and the formermember obstructing the latch seat when the latch is in to preclude latchremoval therefrom.

9. Control apparatus including a movable latch, a holding seat for thelatch, a release member movable to lock the latch in its seat, a settingmember for the release member, and a spring normally urging the settingmember to obstruct entrance'of the latch to its seat and coacting insuch position to shift the release member away from seat obstructingposition.

10. Control apparatus including a movable latch, a holding seat for thelatch, a release member movable to lock the latch in its seat, a settingmember for the release member, and connecting means including a springbetween the members causing the setting member in latch seat obstructingposition to hold the release member away from looking position.

11. Control apparatus including a movable latch, a holding seat for thelatch, relatively movable release and setting members, the latter memberobstructing the latch seatwhen the latch is out and the former memberobstructing the latch seat when the latch is in to preclude latchremoval therefrom, a switch opened by the release member, and meanscoacting with the setting member to retain the switch opened.

In Witness whereof I alfix my signature.

ERNEST B. THURSTON.

